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p - przekątna kwadratu
a - bok kwadratu
p = a√2
a = p/√2
a)
p = 8
a = 8/√2 = 4√2
P = a² = 16*2 = 32
b)
p = 12.5
a = 12.5/√2 = 6.25√2
P = a² = 39.0625*2 = 78.125
2.
P=a*h
a=P/h = 125/6 = 20 5/6
3.
d1 = 12
d2 = d1/4 = 3
P = 1/2*d1*d2 = 36*1/2 = 18
a)
P= (8*8):2
P=32cm2
b)
P=(12,5*12,5):2
P=78,125cm2
zad2
125cm:6cm=20,8(3)cm
zad3
P=(12*3):2
P=18cm2
a)d=a√2
8=a√2//:√2
a=4√2
P=(4√2)²=32
b)
12,5=a√2//:√2
a=6,25√2
P=(6,25√2)²=78,125cm²
zad.2
P=a*h
125=a*6//:6
a=20 i 5/6[cm]
zad3.
12:4=3-druga przekątna
P=1/2*12*3
P=18[cm²]